Common cause failure effect analysis for PFDavg uncertainty

Author

Bin, Zhang ; Xianhui, Yang ; Rongxue, Kang

Author_Institution

Dept. of Autom., Tsinghua Univ., Beijing

fYear

2008

fDate

16-18 July 2008

Firstpage

78

Lastpage

82

Abstract

When evaluating safety integrity level of safety instrumented system, uncertainties are often brought into the analysis and will work on the result. This article explains where uncertainties come from and mainly discuss the problem of common cause failure. Based on the simple beta factor model referred in IEC61508, we introduce an advanced Improved Beta Factor Model to reduce the uncertainty of the safety index PFDavg better. The result from calculating common cause failure or not is compared, as well as different beta factor models.

Keywords

IEC standards; failure analysis; safety systems; uncertain systems; IEC61508; PFDavg uncertainty; common cause failure effect analysis; safety instrumented system; safety integrity level; simple beta factor model; Automation; Cause effect analysis; Failure analysis; Instruments; Moon; Process control; Safety; Uncertainty; Common Cause Failure(CCF); Improved Beta Factor Model(IBF); Safety Instrumented Systems(SIS); Safety Integrity Level(SIL); Simple Beta Factor Model(SBF);

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference, 2008. CCC 2008. 27th Chinese

Conference_Location

Kunming

Print_ISBN

978-7-900719-70-6

Electronic_ISBN

978-7-900719-70-6

Type

conf

DOI

10.1109/CHICC.2008.4605419

Filename

4605419